From: Nawaz, Ajaz (Ajaz.Nawaz@bskyb.com)
Date: Mon Dec 12 2005 - 05:35:48 GMT-3
Chris
I've read your email along with the reply from Bob Sinclair. I now have a
rephrased question:
In terms of the rate-limit interface config command; Line rate, average
rate, target rate and CIR are all of one and represented in bps - is this
correct?
Depending on QoS policy 'Be' may or may not be 2*Bc
We can use the example of an 25mb OC3 provided with a in/out burst
capability of 30mb but anything over 30mb must be dropped. According to
'Administering Cisco QoS' pg192 the config should look like this:
Rate-limit input 25000000 30000 30000 conform-action transmit exceed-action
drop
Rate-limit output 25000000 30000 30000 conform-action transmit exceed-action
drop
Unless this is a mistake 'Be' does not equate to 2*Bc and instead is
determined by the QoS policy itself.
Rgrds
Ajaz Nawaz
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Chris Lewis
Sent: 10 December 2005 16:40
To: Nawaz, Ajaz
Cc: ccielab@groupstudy.com
Subject: Re: rate-limit average bps
Ajaz,
You'll have to help me with the wording a little more. The average rate is
the target or CIR you want to police to over time. Are you saying you want
to set the CIR to 0 in the police statement and rely upon Bc and Be to allow
traffic through? If so I don't think that will work.
For the policing algorithm (rate-limit is basically the same in this
respect), tokens are placed in the bucket according to the formula
(T-T1)*target rate. So if the target rate is zero, no tokens get in the
bucket and nothing is passed.
Chris
On 12/10/05, Nawaz, Ajaz <Ajaz.Nawaz@bskyb.com> wrote:
>
> Dear Group,
>
> <
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqo
> s_r/qrfcmd8.htm#wp1037428>
>
> "bps - Average rate, in bits per second (bps). The value must be in
> increments of 8 kbps."
>
> I want to rate-limit http traffic but only have burst-normal and burst-max
> figures stipulated. How does one come about the 'average rate (bps)'?
>
> Tia
> Ajaz Nawaz
>
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